Automatic back-washing plate frame filter

Abstract

The invention discloses an automatic back-washing plate frame filter which comprises a main engine, a back-washing device and a plate frame filter rack, wherein the main engine comprises an upper body cover plate, a filter element body, an intermediate plate and a base in sequence from top to bottom; the filter element body is divided into a clear liquid tank positioned at the upper part and a filter element tank positioned at the lower part; a plurality of filter element filter plates are arranged in the filter element tank at uniform intervals; intervals of front and back adjacent filter element filter plates are formed into filter seams, the lower ends of the front filter seams are in sealed connection with the plate surface of the intermediate plate, the upper ends of the front filter seams are communicated with the clear liquid tank, the lower ends of the back filter seams are communicated with a to-be-filtered liquid through hole in the intermediate plate, and the upper ends of the back filter seams are sealed, so as to form a staggered connection structure; a piston cavity structure is formed by the intermediate plate and the base; a back-washing device is arranged in the piston cavity, and comprises a piston, a hydraulic device connected with the piston and a back washing outlet; the piston and the plate surface of the intermediate plate are connected in a sliding and sealed manner; a back-washing inlet corresponding to the to-be-filtered liquid through hole in position is formed in the piston. According to the automatic back-washing plate frame filter, automatic back-washing can be realized in the use process, and the filtration quality is high.

Description

technical field [0001] The invention belongs to the technical field of separation equipment, and relates to equipment for solid-liquid separation, in particular to an automatic backwashing plate and frame filter. Background technique [0002] Plate and frame filter press is used in chemical industry, ceramics, petroleum, medicine, food, smelting and other industries. The separation process is: the mixed liquid flows through the filter medium (filter cloth), the solid stays on the filter cloth, and gradually accumulates on the filter cloth to form a filter mud cake. The filtrate part penetrates the filter cloth and becomes clear liquid without solids. [0003] According to whether the filter residue needs to be washed, the filter press can be divided into two types: washable and non-washable. The filter plate of the washable filter press has two types. The filter plate with the washing liquid inlet hole is called A porous filter plate (also known as a washing plate), and a ...

AI Technical Summary

Problems solved by technology

The shortcomings are mainly manifested in the following aspects: small processing capacity, intermittent production, long press time, heavy body, large space occupation, complicated operation, high operation cost, high filter cloth consumption, short life of filter plate, maintenance Big

In terms of the design of the hydraulic system, there are few explanations in the above-mentioned prior art, or relatively general mechanical hydraulic equipment is used, but these hydraulic systems generally have the following disadvantages: no filter for the system oil is installed in the hydraulic system, The on-site working conditions are full of dust and liquid slurry, which can easily enter the hydraulic pipeline and pollute the oil. Therefore, the entire system and individual hydraulic cylinders often fail to work normally; the connecting pipes of the system are suspended in mid-air, And there is no fixed pipe clamp to fix it, resulting in many leakage points, large vibration, and loud noise in the entire system, resulting in many pipeline ruptures and leakage accidents, high failure rate, unstable system operation, and difficult repairs

The pressure gauge on the rodless chamber of the hydraulic cylinder is not a shock-resistant pressure gauge. The workers are not familiar with the working principle of the hydraulic system, blindly adjust the system, and under the impact of the hydraulic pressure itself, all the pressure gauges are damaged, and the pressure display is incorrect, which further reduces the The positioning accuracy of the hydraulic system is reduced, resulting in looseness and glue leakage between the filter plates of the filter, which seriously affects the use efficiency and automatic operation of the filter.

Especially in the construction of these existing technologies limited to the structure of the filter itself, the precision of backwash control is not high, and the efficiency of backwash effect is low

[0013] In addition, the filters in the prior art have been controlled by traditional relays for a long time, the circuit is complicated, there are many faults, the maintenance cost is high, and the technology is not easy to master

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